Today we’re releasing our production-ready implementation of Google Zanzibar: SpiceDB, an open source, Zanibar-inspired permissions database.` The company behind Authzed.com has developed a scalable and flexible permissions system called SpiceDB, which is based on the principles outlined in the Google Zanzibar paper. SpiceDB offers several advantages over traditional permission systems, including support for globally replicated backends, ACID semantics, and a permissive Apache License 2.0. The service is production-ready, has built-in monitoring, and provides a powerful Schema DSL to make it easier to write and reason about permissions configurations. It also includes features such as inverse permissions, ACL filtered lists, and developer conveniences like an in-memory test server command. SpiceDB can be used by anyone, including those who want to pay someone else to run it on their behalf, making it a unique solution for managing permissions in service-based architectures.